[patch] musb: potential use after free

[Dan Carpenter]

We assign "urb->hcpriv = qh;" a few lines down.  I'm pretty sure we 
want it "urb->hcpriv" to be NULL not a freed value.

Signed-off-by: Dan Carpenter <error27@xxxxxxxxx>
---
Found with a static checker.  I don't have the hardware to test this.

diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
index dec896e..877d20b 100644
--- a/drivers/usb/musb/musb_host.c
+++ b/drivers/usb/musb/musb_host.c
@@ -2042,6 +2042,7 @@ static int musb_urb_enqueue(
 		 * odd, rare, error prone, but legal.
 		 */
 		kfree(qh);
+		qh = NULL;
 		ret = 0;
 	} else
 		ret = musb_schedule(musb, qh,
--
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